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Acta Pharmacol Sin. 2017 Nov;38(11):1486-1500. doi: 10.1038/aps.2017.106. Epub 2017 Aug 10.

The novel resveratrol derivative 3,5-diethoxy-3',4'-dihydroxy-trans-stilbene induces mitochondrial ROS-mediated ER stress and cell death in human hepatoma cells in vitro.

Author information

  • 1School of Biological Sciences, University of Ulsan, Ulsan 44610, Korea.
  • 2School of Pharmacy, Ajou University, Suwon 16499, Korea.
  • 3Targeted Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongwon, Chungbuk 28116, and Department of Biomolecular Science, University of Science and Technology, Daejeon 34554, Korea.
  • 4Cancer Cell and Molecular Biology Branch, Research Institute, and Department of System Cancer Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408, Korea.
  • 5School of Biological Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea.

Abstract

Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a well-known polyphenol that is present in grapes, peanuts, pine seeds, and several other plants. Resveratrol exerts deleterious effects on various types of human cancer cells. Here, we analyzed the cell death-inducing mechanisms of resveratrol-006 (Res-006), a novel resveratrol derivative in human liver cancer cells in vitro. Res-006 was more effectively suppressed the viability of HepG2 human hepatoma cells than resveratrol (the IC50 values were 67.2 and 354.8 μmol/L, respectively). Co-treatment with the ER stress regulator 4-phenylbutyrate (0.5 mmol/L) or the ROS inhibitor N-acetyl-L-cysteine (NAC, 1 mmol/L) significantly attenuated Res-006-induced HepG2 cell death, suggesting that pro-apoptotic ER stress and/or ROS may govern the Res-006-induced HepG2 cell death. We further revealed that treatment of HepG2 cells with Res-006 (65 μmol/L) immediately elicited the dysregulation of mitochondrial dynamics and the accumulation of mitochondrial ROS. It also collapsed the mitochondrial membrane potential and further induced ER stress and cell death. These events, except for the change in mitochondrial morphology, were prevented by the exposure of the HepG2 cells to the mitochondrial ROS scavenger, Mito-TEMPO (300-1000 μmol/L). The results suggest that Res-006 may kill HepG2 cells through cell death pathways, including the ER stress initiated by mitochondrial ROS accumulation. The cell death induced by this novel resveratrol derivative involves crosstalk between the mitochondria and ER stress mechanisms.

PMID:
28795692
PMCID:
PMC5672065
[Available on 2018-11-01]
DOI:
10.1038/aps.2017.106
[PubMed - in process]
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